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Kernel/PCI: Convert PCI BAR number to a strong typed enum class

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Liav A 2022-09-02 19:59:08 +03:00 • committed by Linus Groh
parent f510c0ba04
commit bb6f61ee5d
10 changed files with 26 additions and 17 deletions
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12
Kernel/Bus/PCI/API.cpp
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@ -94,10 +94,10 @@ u32 get_BAR5(Address address)
return read32(address, PCI::RegisterOffset::BAR5);
}
u32 get_BAR(Address address, u8 bar)
u32 get_BAR(Address address, HeaderType0BaseRegister pci_bar)
{
VERIFY(bar <= 5);
switch (bar) {
VERIFY(to_underlying(pci_bar) <= 5);
switch (to_underlying(pci_bar)) {
case 0:
return get_BAR0(address);
case 1:
@ -138,11 +138,11 @@ static u8 read8_offsetted(Address address, u32 field) { return Access::the().rea
static u16 read16_offsetted(Address address, u32 field) { return Access::the().read16_field(address, field); }
static u32 read32_offsetted(Address address, u32 field) { return Access::the().read32_field(address, field); }
size_t get_BAR_space_size(Address address, u8 bar_number)
size_t get_BAR_space_size(Address address, HeaderType0BaseRegister pci_bar)
{
// See PCI Spec 2.3, Page 222
VERIFY(bar_number < 6);
u8 field = to_underlying(PCI::RegisterOffset::BAR0) + (bar_number << 2);
VERIFY(to_underlying(pci_bar) < 6);
u8 field = to_underlying(PCI::RegisterOffset::BAR0) + (to_underlying(pci_bar) << 2);
u32 bar_reserved = read32_offsetted(address, field);
write32_offsetted(address, field, 0xFFFFFFFF);
u32 space_size = read32_offsetted(address, field);